[CI/Build] Disable LLaVA-NeXT CPU test (vllm-project#5529)

Author: DarkLight1337

.buildkite/run-cpu-test.sh

@@ -19,6 +19,5 @@ docker exec cpu-test bash -c "python3 examples/offline_inference.py"
 # Run basic model test
 docker exec cpu-test bash -c "cd tests;
   pip install pytest Pillow protobuf
-  bash ../.buildkite/download-images.sh
   cd ../
-  pytest -v -s tests/models --ignore=tests/models/test_llava.py --ignore=tests/models/test_embedding.py --ignore=tests/models/test_registry.py"
+  pytest -v -s tests/models -m \"not llava\" --ignore=tests/models/test_embedding.py --ignore=tests/models/test_registry.py"